The material for these hard disc cases are ABS for main bod, and there is a small clear piece in the center is PC (inserting mold). So the hard disc cases have two versions : one is non-clear PC windows (shot-off and fit other things) and the other is with clear PC window. The polish grade after refractometer checking is #104.
The molds for both parts were designed in two cavities. Also, for the outcase molds, there are two molds, one for normal mold (shot-off mold) and the other is inserting mold.